The focus of this week's i-talk, Euronews' programme presented by "Mr. Europe" Alex Taylor, is the 50th anniversary of Yuri Gagarin's trip to space-- the first ever manned space travel.

Answering the viewers' questions are the International Space Station's current occupants: commander Dimitri Kondratyev, flight engineers Katie Colman, Paulo Nespoli, Andrei Samokutyaev, Ron Garan and Andrey Borisenko.

Find out how their experience is contributing to medical research, whether space tourism is just round the corner, and what happens to the human body when you spend time in space.